Bicycle MechanicsBroken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

They were compatible til sometime in '03-'04 when the BB was 'integrated' and thus
made even more proprietary and incompatible. Octalink versions of DA were the previous standard. You should be able to find octalink DA arms with a bit of a search.
Also DA triples are a late octalink arm development. Unless you got them cheap it
would make little sense to change, and even cheap you gain nothing. Steve

thanks ... i have an older set of dura ace cranks (the octa link?) that look very similar to the ultegra (which now has a bent chain ring arm (see: http://www.bikeforums.net/showthread.php?t=57826). the old DA is about 5 or more years old so it sounds like i can just swap them out... thanks!

Time to wake up an old thread. With the new stages power meter in mind, are ultegra and dura ace arms interchangeable? I have dura ace 7900 now and may buy a second bike with ultegra 6700.
When I want power on the "other" bike, I can just swap the arm.

Time to wake up an old thread. With the new stages power meter in mind, are ultegra and dura ace arms interchangeable? I have dura ace 7900 now and may buy a second bike with ultegra 6700.
When I want power on the "other" bike, I can just swap the arm.